I'm tasked with coming up with an IP plan for an very large lab network. I want to maximize route table manageability and router/firewall log readability. I was thinking of building this lab with the following address space: 1.0.0.0 /8 10.0.0.0 /8 100.0.0.0 /8 I need 3 distinct zones which is why I wanted to separate them out. In any case, I was wondering about the status of the 1 /8 and the 100 /8 networks. What does it mean that they are IANA reserved? Reserved for what? http://www.iana.org/assignments/ipv4-address-space Anyone else ever use IANA reserved address spacing for lab networks? Is there anything special I need to know? I'm under the impression that as long as I stay away from special use address space, I've got no worries. http://www.rfc-editor.org/rfc/rfc3330.txt Thanks, BM